Assessment of RELAP5/MOD2 Against a 10% Load Rejection Transient from 75% Steady State in the Vandellós II Nuclear Power Plant (NUREG/IA-0109, UNID–91–08)

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Publication Information

Date Published: May 1993

Prepared by:
C. Llopis, Asociación Nuclear Vandellós
J. Perez, Consejo de Seguridad Nuclear
A. Casals, Asociación Nuclear Vandellós
R. Mendizabal, Consejo de Seguridad Nuclear

Asociación Nuclear Vandellós
c/Travesera de Les Corts 39–43.–08028 Barcelona
Consejo de Seguridad Nuclear
c/Justo Dorado 11.–28040–Madrid

Prepared as part of:
The Agreement on Research Participation and Technical Exchange
under the International Thermal-Hydraulic Code Assessment
and Application Program (ICAP)

Office of Nuclear Regulatory Research
U.S. Nuclear Regulatory Commission
Washington, DC 20555-0001

Availability Notice


The Consejo de Seguridad Nuclear (CSN) and the Asociación Nuclear Vandellós have developed a model of Vandellos II Nuclear Power Plant. The ANV collaboration consisted in the supply of design and actual data, the cooperation in the simulation of the control systems and other model components, as well as in the results analysis.

The obtained model has been assessed against the following transients occurred in plant:

- A trip from the 100% power level (CSN)
- A load rejection from 100% to 50% (CSN)
- A load rejection from 75% to 65% (ANV)
- A feedwater turbopump trip (ANV)

This copy is a report of the load rejection from 75% to 65% transient simulation. This transient was one of the tests carried out in Vandellós II NPP during the startup tests.

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